Eraser-cleaner



F. M. SCHAEFER.

FRASER CLEANER.

APPLICATION FILED SEPT; 19, I918.

Patented Dec. 13, 1921.

F. M. SCHAEFER.

ERASER CLEANER.

APPLICATION FILED saw I9. 1918 1,399, Patented D0013, 1921.

3 SHEETS-SHEET Z- 50 W", m fl 26...

W ii; i j 4 57 5 a 2 5 w 7 5 1/3 /6/ 21 I; z y

F. M. SCHAEFER.

' ERASER'CLEANER.

APPLICATION FILED SEPT. I9, 1918.

1,399,888. Patented Dec. 13, 1921.

3 SHEETSSHEET 3- T UNITED STATES- PATENT omce.

FRANK m. SGHAEFER, or CHICAGO, ILLINOIS, ASSIGNOR TO JAMES LYNN, or I WABASH, INDIANA.

ERASER-CLEANER.

Specification of Letters Patent.

Patented Dec. 13, 1921.

, Application filed September 19, 191.8. Serial No. 254,849.

Cook and State of Illinois, have invented certain new and-useful Improvements in an Eraser-Cleaner; and I do hereby-declare that the followingis a full, clear, and exact description of the same, reference being had to'the accompanying drawlngs, and to the numerals of reference marked thereon,

struct a felt eraser cleaner adapted to remove dust from felt. blackboard rasersand blow said dust into a bag.

Another object of the invention-is to provide a cleaning machine wherein a rotatable brush is equipped with rows of beater members adapted to loosen up the felt on felt erasers to permit the brush bristles to remove the dust therefrom. 1

. up the felt to permit-removal of the vention to tion to construct a'felt eraser cleaning ma- It is also an object of the invention to construct a cleani machine for felt blackboard erasers, said machine having a mechanism for simultaneously operating a fan and a brush mechanismto remove dustfrom felt erasers.

A further object-of this invention is the construction of .an eraser cleaner wherein a cylindrical brush is provided with centrifmembers adapted to strike portion of an eraser to loosen dust ugally actin against the fe lt chine of simpleand effective construction adapted to be manually operated to cause'a brush and fan remove dust' from felt erasers.

Other and further important objects of this invention will apparent from the disclosures in the drawm'gsand specification.

- Fig. 5, with The invention (in a'preferred form). is illustrated in the drawings and hereinafter more fully described.

On the drawings: v Figure 1 is a top plan view of an eraser cleaner embodying the principles of this inventlon.

Fig. 2 is a top planview of the interiorof I v the device with the casing removed.

Fig. 3 a sectional view taken on line of Flg. 1, showing parts in elevation. Fig. 4 is a transverse section taken on line 4.4'of Fig. 3.

,Fig. 5 is an enlarged detail sectional view taken on line 5-5 of Fig. '3;

Fig. 6 is a section taken on line 6-6 of parts shown in elevation and parts omitted.

Fig.7 is a sectional View taken on line 7'7 ofFig. 1.

Fig. 8 is a detail section taken on line 88 of Fig. 2, showing a fragmentary portion of the dust bag attachmen v F 1g. 9 is an enlarged fragmentary detail section showing the method of attaching the casing to the base member.

As shown on the drawings: 7 The reference numeral '1, indicates a base member or floor having the upper peripheral edge cut away to afford a groove 2. The base 1, is made of wood or any other suitable materials and is supported by short legs or supports 3. Securely mounted upon the top and near'one corner of the base 1,

is a standard or bracket 4, having bearing sleeves 5 and 6, integrally formed on the upper end thereof. A short shaft or axle 7, is journaledin the bearing sleeve 5, and has removably engaged on the outer extending end thereof a crank 8, provided with a knob ,or handle 9. Keyed or otherwise secured uponthe inner end of the shaft 7 is alarge spiral gear 10,- which meshes with -a spiral pinion or small gear 11, keyed or otherwise secured upon the stub shaft 12, journaled in the bracket 4, below and parallel to the shaft 7 Alsokeyed upon the stubshaft 12, to the inside of the pinion 11, and spaced therefrom is a large auxiliary spiral gear 13, which-is in mesh withv a small gear or spiral pinion 14, keyed upon afmain shaft 15, having one end thereof journaled in the bearing sleeve 6, of the bracket 4. Removably secured to the bottom of the bearing sleeve 6 is a grease cup 16. p v

sleeve 19, forms a part of the outer end wall of the tub l7, and rotatably supports the other end of the main shaft 15. A grease cup 20, is removably secured in an opening in the bearing sleeve 19, for the purpose of lubricating the bearing end of the shaft 15.

, A flange 21, is integrally formed on the inner open end of the tub 17, and secured to said flange by means of bolts 22, are the lugs 23, of a fan casing 24, having integral supporting legs 25, which rests upon and are secured to the base 1. The outer end of the fan casing 24, is open and registers with the open inner end of the tub 17. The end wall of the casing 24, is centrally apertured to permit the main shaft 15, to project therethrough. Disposed within the fan casing 24, is a disk or plate 26, provided with a passaged tub 27, which is secured to the main shaft 15, to permit rotation of said disk therewith. Integrally formed or rigidly secured at right angles to the disk 26, are a plurality of curved radial fan blades 28, which extend from the outer peripher 1 of said disk to within a short distance 0 the center thereof. An outlet flue or pipe 29:, is formed at the lower portion of one side of the fan casing 24, and has the outer surface of the end thereof ribbed or threaded as denoted by the reference numeral 30, to removably receive the neck or collar 31, of a dust bag or receptacle 32, engaged thereon.

A cylindrical brush member is rigidly secured upon the main shaft 15, within the tub 17, and embraces a sleeve 33, provided with a plurality of apertures on each side thereof within each of which is rigidly secured the inner end of a brush tuft 34. The two apertured sides of the sleeve are separated by two longitudinally disposed diametrically opposite ribs 35, which leave openings 36, forming two brush sections.

Passaged end plates 37, are engaged on the main shaft '15, and abut the ends of the brush sleeve 33, and are held ri 'dly clamped in position by longitudinally disposed bolts or rods 38, which project through the openings 36, between the brush sections. Piv otally mounted upon each of the clamping bolts '38, between the end plates 37, are a lurallty of centrifugally acting hook memrs or beaters 39, separated from each other by spacing rin s 40. Theouter hooked ends of said centri ugal beaters 39, are disposed in the circumference of the cylindrical brush,

' with the hooks on said rods disposed in opposite directions, as clearly shown in Fig. 5; The mechanisms mounted upon the base-1, are inclosedby means of a box or casing 41,

the lower margin of which is flanged outwardly as denoted by the reference numeral 42, to permit the casing to rest in the base] groove 2. The casing 41, is removably secured to said base 1, by means of screws 43,

ings 45. A large opening is provided in the front wall of the casing 41, to afford access to the mechanisms within the casing. The

large opening is closed by means of a removable door 46, having a handle or knob 47, thereon which is adapted .to be turned to move a locking tongue 48, into looking or release position with respect to said front we ing wall. Each end wall of the casing 41, is provided with anopening to permit the bearing sleeve 19, and the crank '8, to project therethrough. Saidcasing 41, is also open at the top above the tub 17, and said openingis covered by a light metal casting which is secured to the casing 41, byscrews or other suitable means, and comprises a channel guide 49, provided with'a guide wall or back 50, and downwardly projecting lugs or projections 51, which serve to hold the Theguide channel 49, is provided rotated to permit the same to engage the felt flaps or strips 53, of a blackboard eraser 54, which is to be cleaned and which is moved transversely of the device in the brush guide holder or casting.

The operation is as follows: With the device assembled as shown and described a blackboard eraser 54, or other similar article is adapted tobe cleaned b placing the eraser upon the casting wit the felt portion 53, resting upon the upper surface of the guide channel 49, and with the eraser back having one longitudinal edge thereof positloned to contact the guide wall 50. An operator guides and moves the eraser with the left hand across the opening 52, and at-the same time turns thecrank 8, with. the right hand at any desired speed. Rotation of the crank causes the large driving gear 10, 'torotate and thereby transmits an increased drive to the main shaft 15, through the pinions 11 and 14, and the gear 13. The rapid rotation of the main shaft 15, rotates the cylindrical brush thereby causing the ends of the bristles 34, to

causes said hook beaters to be thrown outwardly by centrifugal force to engage the with the brush and sets up a suction through the tub 17, and the fan casing 24 whereby the chalk dust removed from the felt eraser is drawn downwardly through the opening 52, and passes outwardly through the tube 29, into the dust bag or receptacle 32, where it is collected. When the bag is sufliciently full of chalk dust and other dirt which has been removed from erasers the bag may be removed from the tube 29, and emptled.

Access to the mechanisms within the casing 41, is readily had by removing the door 46, by turning the knob 47, thereby disengaging the tongue 48, from behind the front wall of the casing. The shaft 15, has the bearings ends thereof lubricated by grease from the grease cups 16 and 20.

The operation of the device is very simple and by merely turning the crank 8, simultaneous rotatlon of the fan and the cleaning brush is effected at an increased rate of speed due to the ratio of the driving gears and pinions. The centrifugal beaters or scrapers 39, of the brush mechanism are mounted in longitudinal r'ows between the brush bristles 34, and serve to loosen the dust from the felt strips of an eraser so that the bristles may remove the same. Blackboard erasers and other similar articles may be rapidly and thoroughlycleaned without permitting the dust and dirt removed therefrom from flying about.

I am aware that numerous details of con struction maybe varied through a wide range without departing from the prin- 40 ciples of'this invention, and I therefore do not propose limitin the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. An eraser cleaner of the class described comprising a shaft, driving mechanisms therefor a sleeve rovided with end plates mounted on said s aft to rotate therewith, brush tufts mounted thereon, in sections separated from one another, rods carried by i said end plates and disposed between said brush sections, and a plurality of beater members pivotally mounted on said rods.

2. An eraser cleaner embracing a rotata- I ble shaft, an apertured sleeve secured thereon, brush bristles secured in' said sleeve apertures, plates on said shaft adjacent the 4 ends of said sleeve, rods connecting said plates and holdin the same clamped against the ends of said s eeve, hooked beater mem bers pivotally mounted on said rods, and spacers between said hooked members.

3. An eraser cleaner comprising a shaft, means for rotating the same, anda cleaning. mechanism mounted on said shaft embrace5 ing brush members, rods separating the brush members, and centrifu ally acting hook members disposed there etween on said rods which extend parallel to the shaft.

' In testimony whereof I have hereunto 7o subscribed my name in the presence of two subscribing witnesses.

FRANK M. SOHAEFER. Witnesses: Lawmmcn Rnmsrnm,

EARL M. HARDINE. 

